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Science Terms

Vocabulary Words

Across
Takes oxygen from the air and delivers oxygen to the blood
Fish are ________
Also known as a gas bladder
Sharks belong to a class of fish called _____ fish
Means "double life"
The union of sex cells outside the bodies of parents
A bag of fluid that surrounds the embryo
There are sometimes called warmblooded animals
Amphibians are _______ animals
There are sometimes called cold blooded animals
Down
An organ that removes oxygen from the water
Dinosaurs are known prehistoric ______
Fertilization that happens inside the body
An animal that has a backbone
Vertebrates belong to this phylum
Most fish have a _______ system
Mammals are ________ animals
An egg that hold fluid that protects the embryo
This is the tough material of the nose and ear
Gives the embryo a rich supply of food